"Achakzai, Omar" <omar.achakzai@xxxxxxxxxxxxx> writes: > 1. What happens when the file system on which the pg_xlog directly resides,= > completely fills up? Does PostgreSQL wait until free space is available ag= > ain?=20 I believe it'll PANIC and shut down. You won't lose any committed transactions ... but transactions in progress are out of luck. > 2. Our PostgreSQL database (version 8.1.4.) generates almost 20 GB of WAL f= > iles per hour! What are the best practices related to administering large a= > mounts of WAL files? Would it be wise to compress the WAL files?=20 What are your checkpoint settings? Reducing checkpoint frequency is one way to cut the WAL volume. regards, tom lane
